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Jordan homomorphisms revisited

Published online by Cambridge University Press:  01 March 2008

MATEJ BREŠAR*
Affiliation:
Department of Mathematics and Computer Science, FNM, University of Maribor, Koroška 160, 2000 Maribor, Slovenia.

Abstract

Let θ be a Jordan homomorphism from an algebra A into an algebra B. We find various conditions under which the restriction of θ to the commutator ideal of A is the sum of a homomorphism and an antihomomorphism. Algebraic results, obtained in the first part of the paper, are applied to the second part dealing with the case where A and B are C*-algebras.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 2008

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References

REFERENCES

[1]Baxter, W. E. and Martindale, W. S.3rd. Jordan homomorphisms of semiprime rings. J. Algebra 56 (1979), 457471.CrossRefGoogle Scholar
[2]Benkovič, D.Jordan homomorphisms on triangular matrices. Linear Multilinear Algebra 53 (2005), 345356.CrossRefGoogle Scholar
[3]Brešar, M.Jordan mappings of semiprime rings. J. Algebra 127 (1989), 218228.CrossRefGoogle Scholar
[4]Brešar, M.Jordan mappings of semiprime rings II. Bull. Austral. Math. Soc. 44 (1991), 233238.CrossRefGoogle Scholar
[5]Brešar, M.Centralizing mappings on von Neumann algebras. Proc. Amer. Math. Soc. 111 (1991), 501510.CrossRefGoogle Scholar
[6]Brešar, M.Jordan derivations revisited. Math. Proc. Camb. Phil. Soc. 139 (2005), 411425.CrossRefGoogle Scholar
[7]Brešar, M.Fošner, A. and Fošner, M.. Jordan ideals revisited. Monatsh. Math. 145 (2005), 110.CrossRefGoogle Scholar
[8]Brešar, M.Kissin, E. and Shulman, V. S.. When Jordan modules are bimodules, Quart. J. Math., to appear.Google Scholar
[9]Civin, P. and Yood, B.. Lie and Jordan structures in Banach algebras. Pacific J. Math. 15 (1965), 775797.CrossRefGoogle Scholar
[10]Herstein, I. N.Jordan homomorphisms. Trans. Amer. Math. Soc. 81 (1956), 331341.CrossRefGoogle Scholar
[11]Jacobson, N.Structure and representation of Jordan algebras, AMS Coll. Public. Vol. 39 (Providence, 1968).Google Scholar
[12]Jacobson, N. and Rickart, C.. Jordan homomorphisms of rings. Trans. Amer. Math. Soc. 69 (1950), 479502.CrossRefGoogle Scholar
[13]Kadison, R. V.Isometries of operator algebras. Ann. Math. 54 (1951), 325338.CrossRefGoogle Scholar
[14]Martindale, W. S.3rd. Jordan homomorphisms onto nondegenerate Jordan algebras. J. Algebra 133 (1990), 500511.CrossRefGoogle Scholar
[15]Mc Crimmon, K.The Zelmanov approach to Jordan homomorphisms of associative algebras. J. Algebra 123 (1989), 457477.CrossRefGoogle Scholar
[16]Pearcy, C. and Topping, D.. On commutators in ideals of compact operators. Michigan J. Math. 18 (1971), 247252.CrossRefGoogle Scholar
[17]Smiley, M. F.Jordan homomorphisms onto prime rings. Trans. Amer. Math. Soc. 84 (1957), 426429.CrossRefGoogle Scholar
[18]Stφrmer, E.On the Jordan structure of C*-algebras. Trans. Amer. Math. Soc. 120 (1965), 438447.Google Scholar